2015 nissan sentra mass air flow sensor problems

Rebuilt engine installed 12/2012, entire clutch replaced 05/2013, clutch Master & Slave cylinder replaced again 10/2014 (leaking Master). 2014, no problem codes with the O2 sensors after that. I replaced the pre-cat with straight header in Nov. I wonder if it might be the ECU or wiring causing the problem. Problem starting car, takes many attempts, dies if I give it gas, idle at 1500, has a slight back fire (like it is congested while idling) and won't go above 2500 rpm.

All I needed for that was a new cover since seals were bad, but now have problem starting car. When I removed the coil packs to get to fuel injector rail better, 3 of the coils covered in oil, one dripping wet. Next day checked under hood thinking it might have been Air Intake leak possibly at fuel injectors. It stalled while I was coming around turn at about 30 mph/3rd gear. I just got my 2002 Nissan SpecV out of the shop after a week with mechanic not accustomed to working on these. I finally cut that wire anyway since amp was removed. I was hoping a ground wire left connected to battery was the solution to my 3rd MAF issue in 3 years, but the GND wire previous owner ran to amps was not the problem today.

Anyways if anyone has any ideas of something else i can try before i fork out a pile of cash and find out that wasnt even the problem you would be my new best friend lol :icon16: no im back to pulling out hair cuz i dont really wanna buy one off ebay for $86 +shipping cuz i havnt had any luck with most of ebay junk and my local parts places run from $696+ core+shipping on special order items and go up from there and nissans closed so cant price that out out but my guess is it will make a person cry. so back to digging on forums, came across a simple test on the sensor's orange and blue wire to check volts (spose to be around 1v with key on and not running and then when running the volts go up as the rpm goes up, well so i understood.) well checked it and mines at 2.3volts all the time running or not. Kay i have a 02 spec and ran awesome till this morning when i pulled off a side road onto the highway and just as i was grabbing 3rd it went into limp mode (no more than 2300 rpm) and so i limped my way back home and pulled the p1102 code and started digging on here for answers and came across people that had the same issue and just managed to get away with just cleaning maf sensor and they were good.

2015 nissan sentra mass air flow sensor problems